RU2169777C2 - Charging apparatus of blast furnace - Google Patents

Abstract

FIELD: metallurgy, namely equipment for charging blast furnaces. SUBSTANCE: charging apparatus of blast furnace includes retractable frame rested upon support mounted separately from furnace. Damper in the form of jaw lock is placed with gap relative to upper gas valve of accumulating hopper arranged under intermediate hopper. Apparatus is provided with sealed flexible cover having two mutually joined U-shaped or arc-shaped portions embracing damper with possibility for closing gap. EFFECT: simplified mounting-demounting processes of separate units of apparatus with reliable sealing of them. 3 dwg

Description

 The present invention relates to the field of ferrous metallurgy, and in particular to equipment of a blast furnace loading system.

 A loading device of a blast furnace mounted on its dome is known, comprising a drive distribution tray, a hopper mounted above it, an accumulator with a system of gas valves for balancing the pressure between atmospheric pressure and pressure in the interior of the furnace and an intermediate hopper located above it with an outlet opening blocked by a valve (SU N 427057, С 21 В 7/20, 05/05/1974).

 The disadvantages of the known device is the inability to independently dismantle individual nodes of the boot device and ensure their sealing.

 The closest technical result achieved and the number of matching features is a blast furnace loading device mounted on its dome, containing a drive distribution tray, a storage hopper mounted above it with upper and lower gas valves to equalize the pressure between atmospheric pressure and pressure in the interior of the furnace , and an intermediate hopper located above it with an exit opening blocked by a valve, dynamically isolated from other nodes of the device (S U N 1007558, C 21 V 7/20, 12/07/1979).

 The disadvantages of the closest analogue are the difficulty of node-wise installation and dismantling of individual components of the device, as well as the inability to provide reliable sealing of the device.

 The technical result of the claimed invention is the provision of installation and dismantling of individual components of the device, as well as their reliable sealing. To ensure the specified technical result, a blast furnace loading device mounted on its dome, containing a drive distribution tray and a storage hopper mounted above it with upper and lower gas valves to equalize the pressure between atmospheric pressure and the pressure in the internal space of the furnace, and an intermediate one located above it hopper with outlet closed by a valve and dynamically isolated from other components of the device, while according to the invention the device is equipped with about a rolling frame resting on a support independent of the furnace, with an intermediate hopper mounted on it, the valve of which is made in the form of a jaw shutter, located with a gap from the upper gas valve of the storage hopper, the device is also equipped with a hermetic flexible casing formed by two U connected to each other -shaped or arched parts, which covers the jaw shutter with the possibility of overlapping the gap.

 The presence of a gap between the jaw closure and the upper gas valve, closed by a sealed flexible casing, as well as the presence of a support independent of the furnace with a retractable frame on which an intermediate hopper is mounted, provide independent node-wise installation and dismantling of the loading device and reliable sealing of the device nodes.

The invention is illustrated by drawings, in which:
FIG. 1 shows a general view of a boot device;
FIG. 2 is a section along AA in FIG. 1 (option I);
FIG. 3 is a section along AA in FIG. 1 (II option).

 The blast furnace loading device mounted on the furnace dome 1 contains a drive distribution tray 2 with an eccentric mechanism 3, to which drive shafts 4 are connected via differential gears 5 through a differential drive of mechanism 6. Above the distribution tray 2 is a storage hopper 7 with upper and lower gas valves 8, 9, providing pressure equalization between atmospheric pressure and pressure in the interior of the furnace. Gas valves 8 and 9 are made with sealing plates 10, 11, providing pressure equalization in the storage hopper 7 with the worker in the furnace during unloading and with the atmosphere when loading charge materials. A valve 12 is located above the eccentric mechanism, above which there is a bellows assembly 13, which ensures the independence of weighing of charge materials entering the storage hopper 7, which is equipped with brackets 14 based on strain gauges 15 located on the platform 16, which has supports 17 on the dome 1 of the furnace. A jaw shutter 18 is located at the base of the storage hopper 7, which ensures uniform discharge of charge materials onto the drive distribution tray 2. Above the storage hopper 7, a retractable frame 20 is supported, which is independent of the furnace support 19, with an intermediate hopper 21 located on it, the outlet opening of which blocked by a valve made in the form of a jaw shutter 22. The jaw shutter 22 is located with a gap "a" from the upper gas valve 9 of the storage hopper 7. The jaw shutter 22 covers with the possibility of covering of the gap "a" sealed flexible cover 23, formed as a connected with each other U-shaped portions 24, 25 (FIG. 2) or the arcuate portions 26, 27, 28 (FIG. 3).

 The device operates as follows: the mixture with a skip hoist in the amount of one skip is fed into the intermediate hopper 21 located on the sliding frame 20. In the storage hopper 7, the upper gas valve 9 opens with the jaw shutter 18 closed and the lower gas valve 8. closed. storage hopper 7. Then the jaw shutter 22 opens and the charge enters the storage hopper 7. In this case, the second skip enters the storage hopper into the passage.

 Then the jaw closure 22 is closed, after which the upper gas valve 9 is closed.

 The storage hopper 7 is weighed on the load cells 15 through the brackets 14. Then the lower gas valve 8 is opened, the pressure in the storage hopper 7 is equalized with the furnace.

 After equalizing the pressure in the storage hopper 7, the jaw closure 18 gradually opens and the charge falls on the distribution tray 2. At the same time, the charge materials are evenly distributed over the surface of the blast furnace in accordance with a predetermined program.

 When mounting and dismounting, a flexible sealed casing is removed 23. When clearing the gap "a", it becomes possible to mount and dismantle the intermediate hopper 21 with the jaw shutter 22 attached to it.

 Due to the rollback of the intermediate hopper with the shutter along the sliding frame 19 towards the furnace, load-lifting means are introduced into the vacant space with the help of which the assembly and dismantling of the loading device is carried out.

Claims (1)

 A blast furnace loading device mounted on its dome, containing a drive distribution tray, a storage hopper mounted above it with upper and lower gas valves to equalize the pressure between atmospheric pressure and pressure in the furnace interior, an intermediate hopper located above the storage hopper, an outlet which is blocked by a valve, dynamically isolated from other components of the device, characterized in that it is equipped with a rollback bearing independent from the furnace with a frame and a hermetic flexible casing, while an intermediate hopper is installed on the sliding frame, the valve of which is made in the form of a jaw shutter located with a gap from the upper gas valve, and the hermetic flexible casing is made in the form of U-shaped or arched parts connected to each other, which cover the jaw closure with the possibility of overlapping the gap.

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